package com.dunjx;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.gateway.filter.ratelimit.KeyResolver;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.context.annotation.Bean;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@EnableEurekaClient
@SpringBootApplication
public class GatewayWebApplication {
    public static void main(String[] args) {
        SpringApplication.run(GatewayWebApplication.class, args);
    }

    /**
     * 创建用户唯一标识，使用IP作为用户唯一标识， 来根据IP进行限流操作
     */
    @Bean(name = "ipKeyResolver")
    public org.springframework.cloud.gateway.filter.ratelimit.KeyResolver userKeyResolver() {
        return new KeyResolver() {
            @Override
            public Mono<String> resolve(ServerWebExchange exchange) {
                String userIP = exchange.getRequest().getRemoteAddress().getHostString();// 用户ip
                System.out.println("用户ip为userIP ==》 " + userIP);
                return Mono.just(userIP);
            }
        };

    }

}
